Vane or flap air flow sensor/meter (AFM)

Vane or flap air flow sensor/meter (AFM)

Are your results within the manufacturer's specifications, why or why not?

Yes it does beacasue the readings is qiut the same to the manufactuers specifcition

The 5 volts is a referencer voltage supplied from the ECU. The singal voltage wil change when the van postion changes

Coolant Temperature Sensor




Measuring the Resistancer between the terminals

Does the Sensor meet the manufacture's specififcation why or why nt?

This is a ECT thermistor (engine coolant temperature)

it operation as the engine coolant temperature

Thermo Fan Switch Measuring the Resistance between the terminals

This is a Fan Switch and it switched at 90 degree. the circuit has a relay which is normally siwtched on.



This is a theromistor fan switch

the resistance changes becasue the water it gettin bit hotter and boiled so the resitence changes and going lower and lower

Air temperature sensors

Measuring the Resitance between the two terminals



This is a Air temperature sensor

the higher the air temperature gets the less dense the air becomes. The results of the Air and Coolant sensors well my view is simlar both of them but it depends on the temp n water boiling and how fast it goes and same goes for the switches


Knock Sensor

Explain why are reading a voltage from this sensor when we are not supplying a voltage to it

Because of the friction when you keep tapping it and it shows the wave rasing up and down the back sensor.

Speed Sensors

Checking on the Air Gap of the Distributor


that when i was using a feeler guage




atfer this i used a ocillosope to record the time and voltages showing

probe x volts x 5squares x 1/f = f

0.2v x 5v x 1/f = 1f

when a person was roatate the distributor like spining by hand and the use the oscilloscope on the postive side and show the reading when u spinning the distribuor

Hall Effect Sensors

i have done everything like wired up and things and it ddint works so i have used the voltmeter and the leture was helping me a bit and making me to try find where the fuaulty. and i check all the sensor everyhting was supply 12 volts then throgh hall sensor it was 5v so it a good ground. so i was wondering why it aint working. bt the finally it was the Hall Sensor faulty so i couldnt do the reading and findig the voltages everytime like clockwise until the voltages changes again.